Improvement in portable furnaces



D. B. MONTAGUE.l

Portable Furnace.

No. 112,164. Patented Feb 28, 1871.

@Mesem UNITED STATES PATENT QEEICE.

DIVIGHT B. MONTAGUE, OF SPRINGFIELD, MASSACHUSETTS.

IMPROVEMENT IN PORTABLE FURNACES.

Specification forming part of Letters Patent No. 112,164, dated February 2S, 1871.`

To all whom it may concern:

Be it known that I, Dwrenr B. MONTAGUE, of Springfield, Hampden county, State of Massachusetts, have invented a new' and useful Improved Furnace for Outdoor Work, or to be used with a stove; and I do hereby declare that the following is a full and clear description thereof, reference being had to the.

accompanying drawing, and to the letters of reference marked thereon.

Draw/ing.

Figure I is a top view 5 Fig. II, a top view without cover or grate 5 Fig. III, a side sectional view. Figs. IV and V are detail views of my improved furnace.

My invention relates to forming, combining, and arranging the parts of a furnace so that they will occupy little space, while by varying the positions or removing some of the parts the furnace may be used for different purposes; and the object of my invention is to construct a furnace that will be easily portable by hand, and will answer all the purposes of an outdoor furnace, complete in itself, orform a useful part of a stove indoors.

The object of my improvements is to produce a perfect furnace for outdoor work, or to be used with or as a stove, accomplishing nearly all the results of a stove in cooking or heating, with far less expenditure of fuel.

In construction I form my furnace with double walls, the one B forming the outer shell, and the one C an inner one and the fire-box, aspace, D, being left between them entirely around the furnace. The wall C does not reach as high as the one B; but a iiange, E, is made to connect them and form a top for the chamber I3. This flange is perforated with holes A, to admit the draft on certain occasions, as will be hereafter described.

A double-acting gate, F, at the bottom of the fire-box serves to change the direction of the draft to suit the manner in which the furnace is used.

When the device is used upon a stove, as shown in Fig. III, the lower part fitting over the stove-hole, the draft must be carried through the bottom of the furnace from the top ofthe tire-box, or, in other words, be made to draw downward and into the stove. IVheH, however, the furnace'is used independently, the draft comes up through the bottom, as in ordinary cases; and when the furnace is used upon a stove, and it is yet desired to use it as an independent burner, the draft comes in at the bottom of the furnace, but above the gate F, which is shut off.

In order to accomplish these several results, I construct ports b in the outer shell, B, near the bottom, corresponding ports o in the lower part of the inner wall, C, and form my gate F with a side iiange, G, fitting the lower part of the wall C' inside. This flange G has ports d, corresponding with the ones o in the wall C.

The gate F is pivoted in the center to the bottom H ofthe furnace, and each has correspondin g radial openings I.

When the gate is in a position such as shown in Fig. I, in which the openings of the gate and bottom of the furnace are opposite each other, so that there is free vent through both, the ports in the iiange G are shut oft', so that the draft must go up through the fire-box and out of the top, as in ordinaryfurnaces, or ont of the flue, if one is used. The gate F is turned so as to shut off the openings l at the bottom, the ports in the ange G are open, and the air can come directly into the bottom of the furnace above the gate; and if it is used upon a stove the draft passes up through the tireboX, through the openings a, down through the space D, and out of the ports no into the stove.

When the furnace is set upon its legs, either way of setting the gate produces the result of admitting the draft up through the bottom.

A hue, K, is formed near the top of the furnace and above the iian ge E, so that the furnace may be used with a pipe and regular draft, if desired.

The gate F is formed with the angularshaped projections f j', &c., which serve to clean off the ashes and force them through the bottom openings, I, each time that the gate is turned, thus making it an easy matter to keep the furnace free.

The grate L is attached to the top of the iiange G of the gate, and consequently, when the gate is turned back and forth rapidly by ment it is adopted in.

means of the lever M, attached to it and projectin g outside, the ashes are completely sifted out through the bottom.

A cover is made for the furnace in such a manner that it Will contain various sizes of holes, thus adapting the furnace to the various sizes of utensils belonging to theestablish This is shown in Figs. III and IV, Where it is seen that the top is composed of a number of rings, e e e, each smaller one tting in the one outside of it, the inner edges of each ring being` formed with a shoulder, so that the edges of the :next smaller plate set into it. The outside ring, o, is provided With a rim, Which sets over and around the top edge of the furnace when the plate o is reversed, as shown in Fig. II. This ring, as are others, if desired, is provided with teats p 19, which, When the ring is inserted, serve to set bakers7 and other utensils upon, allowing a draft to circulate under them.

The furnace thus constructed forms a neat and effective device for the purpose, easily handled, and adapting itself to almost any size of utensil.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. rllhe combination of the outer case, B, inner shell, O, openings Iat the bottom, openings b at the side, ports x at the bottom, space D, and gate F With angc G and ports d, the parts being all constructed and arranged to gether as described.

2. The cover formed of a number of rings f1ttin g into each other, when provided With teats .19 p, as described.

3. In combination with the gate F, the triangular projections ff, as described.

D. B. MONTAGUE.

Witnesses:

E. H. HYDE, R. F. HYDE. 

